Book: Enemark, C. and Michaelsen, C. (2005) Just War Doctrine and the Invasion of Iraq. Australian Journal of Politics and History 51, 545-563.

Journal: Szalavitz, M. (2015) Marijuana as a Gateway Drug: The Myth That Will Not Die | TIME.com. Available at: http://healthland.time.com/2010/10/29/marijuna-as-a-gateway-drug-the-myth-that-will-not-die/ [Accessed April 27, 2015].

Website: Poynor, R. (2003) No more rules. Yale University Press, New Haven, CT.